# CVE-2026-40326: Masa CMS CSRF in site bundle creation allows unauthorized site data export

> An attacker can trick an admin into creating a site bundle, exposing sensitive data like password hashes and configuration files to unauthenticated users.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 6 May 2026
- **Updated:** 7 May 2026
- **Also known as:** GHSA-622v-h7vf-w4gm

## What is CVE-2026-40326?

CVE-2026-40326 is a high-severity vulnerability in MasaCMS, published on 6 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Masa CMS is a content management system forked from Mura CMS. In versions 7.5.2 and earlier, the createBundle method in `csettings.cfc` does not properly validate anti-CSRF tokens for site bundle creation requests. An attacker can craft a malicious webpage or link that, when visited by a logged-in administrator, triggers the silent creation of a comprehensive site bundle. This bundle is saved to a predictable, publicly accessible web directory. An unauthenticated attacker can then retrieve the bundle and obtain site content, user account data, password hashes, form submissions, email lists, plugins, and configuration data. This issue has been fixed in versions 7.2.10, 7.3.15, 7.4.10, and 7.5.3. As a workaround, remove unexpected bundle files from public directories, restrict access to the affected endpoint, and limit exposure of administrative sessions.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2026-40326?


## How do I fix CVE-2026-40326?

No fix has been published for CVE-2026-40326 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40326 being exploited?

There is no known exploitation of CVE-2026-40326 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40326 and fix it if it is affected.

What it is: CVE-2026-40326 is a high-severity vulnerability in MasaCMS, published on 6 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-40326 in the wild and no public exploit code.

Affected product: MasaCMS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40326/ (Markdown: https://insights.sbomify.com/CVE-2026-40326/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40326
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40326
- OSV: https://osv.dev/vulnerability/CVE-2026-40326

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40326/
Summaries are generated and may contain mistakes; the official description above is the record.